Home / 12,205.72-18,309.68-3,440.72

Finding the Fourth Proportional to 12,205.72, 18,309.68 and 3,440.72

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Solution

The fourth proportional to 12,205.72, 18,309.68 and 3,440.72 is: 5,161.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,205.72 : 18,309.68 = 3,440.72 : x
  2. Step 2: Convert to fraction form
    12,205.72/18,309.68 = 3,440.72/x
  3. Step 3: Cross multiply
    12,205.72x = 18,309.68 × 3,440.72
  4. Step 4: Simplify right side
    12,205.72x = 62,998,482.17
  5. Step 5: Solve for x
    x = 62,998,482.17/12,205.72
  6. Step 6: Final answer
    x = 5,161.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.